Despite all its apparent serenity, the universe is a very violent place full of cataclysmic events: from clashing galaxies and supernovae (the explosive death of solid stars), to immensely powerful geysers of X -rays and black holes that load stars.
In this deafening cosmic dinom, astronomers have always considered gamma-ray-bursts (GRBs), produced during the formation of black holes, as the most powerful flare-ups in the universe. Incredibly energetic GRBs cross enormous distances, making them the most luminous electromagnetic events since the big bang, the accepted cosmological model to explain the origin and evolution of the universe.
But recently astronomers from the Institute for Astronomy (IFA) of the University of Hawaii identified a new category of events that they found much more powerful than GRBs: Extreme Nuclear Transients (ETTS). In astronomy, transients refer to heavenly objects whose brightness changes considerably for a relatively short period.
Unscrutic creations
The IFA findings, recently published in Science is progressingExtraordinary phenomena that took place when extremely large stars were too close to gigantic black holes in galactic centers and were literally eaten. Their fate was very similar to that of Icarus in Greek mythology, which flew too close to the sun was wings and feathers only for the wings to melt, which made him fall until his death.
“Food are driven by growth of the debris of a massive star that is at least three times heavier than our sun that has been torn apart by a super-massive black hole,” wrote Jason Hinkle, the main author of the IFA study, to the author.
Black holes are one of the most inscrutable creations of nature and super -massive black holes lurking near the centers of galaxies are the largest of all. There is also one in the Melkweg: archer a*.
When a star approaches the horizon of a black hole, the outer edge that does not return the point of no return for even light extreme tiders and compress the star in a long, thin spaghetti-like shape, which release huge amounts of electromagnetic energy. This emission is the ent.
These brilliant space streamers cross enormous distances and remain lighter in radio wave lengths for years, making astronomers possible to study them. In fact, ETS are so powerful that astronomers now believe that they are the “biggest explosions” that have taken place since the Big Bang.
“Food are the most energetic class of temporary events that have been discovered,” said Dr. Hinkle. “They emit up to ten times more energy than the previous record holders.”
Torn apart
Dr. Hinkle came up to Ets when they saw data from the GAIA spacecraft of the European Space Agency, which mapped the Milky Way for more than a decade.
“We were looking for flexible, high amplitude and long -lasting events,” he said. “In 2020 we started following two sources that I had identified in 2016 and 2018 in the GAIA data with spaces-based UV/Ray missions and spectroscopy based on the ground to measure physical parameters that gave the first indications that we saw something special.”
When the Zwicky passing facility [which scans the entire Northern sky every two days using an extremely wide field of view camera at the Palomar observatory in California] Published information about a third comparable event in 2023, it gave extra confidence that we had found a rare new class of temporary phenomena, “he added.
Astronomers have previously observed that stars are torn apart in tidal disruption events (TDEs), which takes place when a star is pulled apart by the tidal forces of a black hole, which releases the energy equivalent of more than a hundred Supernovae in the process. In that sense, TDEs share many similarities with ETS, including hot temperatures, brilliant emissions and wide emission lines. But the two are actually very different.
“The host holy galaxies are much larger than those of a TDE and have a more massive central black hole,” Dr. Hinkle out. “Food are also much rarer than the TDEs that we observe in the local universe. We think that Etts are of massive stars that are simply too rare to observe in the nearby universe.”
ETS also differ from the mysterious fast X-ray transient (FXTs), short-standing eruptions of X-rays of distant galromes that have surprised astronomers since they were first found in the 1970s. The origin of FXTs remained elusive largely because their signals are less energetic.
In extremely light
Despite an exhausting search, which even included candidate sources such as TDEs where a small black hole had interaction with a white dwarf, astronomers could not determine where FXTs originated. The mystery was finally Solved in June When researchers from Northwestern University in the US and the University of Leicester in England discovered that FXTs actually originated from particles with high energy trapped in a Supernova.
It turned out that when high energy particle jets break through the outer layers of a star, they produce GRBs. But when these jets are included in the star, they release X -ray signals with lower energy that we as FXTs perceive. In other words, unlike ETTs, FXTs are essentially an X -ray phenomenon that occurs on very short time scales.
Astronomers are enthusiastic about the prospect of observing the universe in the light of the extreme brightness of ETTs.
Such as Dr. Hinkle said: “By building a sample of ETTs, we can study massive black holes in the early universe, especially the large majority of those who don’t arrive differently, as an excellent addition to studies of growing up black holes in the early universe.”
This will be made easier by a new generation of telescopes and instruments with AI-driven data analysis, such as Vera C. Rubin Observatory in Chile and the Nancy Grace Roman Space Telescope, planned to be launched in 2027. They promise a revolution of our understanding of the Extreme Foundation for Oosme Underfeiging on the Under Estate Foundation of the Extration of the Extration of the Extration Foundation. Scales.
Prakash Chandra is a science writer.
Published – September 22, 2025 05:30 am
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